Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/duvadmin/assessment.downundervisa.com/wp-content/plugins/gravityview/includes/class-gravityview-entry-notes.php:29 Stack trace: #0 /home/duvadmin/assessment.downundervisa.com/wp-content/plugins/gravityview/includes/class-gravityview-entry-notes.php(22): GravityView_Entry_Notes->add_hooks() #1 /home/duvadmin/assessment.downundervisa.com/wp-content/plugins/gravityview/includes/class-gravityview-entry-notes.php(191): GravityView_Entry_Notes->__construct() #2 {main} thrown in /home/duvadmin/assessment.downundervisa.com/wp-content/plugins/gravityview/includes/class-gravityview-entry-notes.php on line 29